Door-operating mechanism.



.FORMAN DOOR OPERATING MEGHANISNI. APPLICATION FILED AuG.26. |915.y

Imam

Patented May 7, i918.

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` To all whom it may concern.'

srarnsr PARIS R. FORMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL PNEUMATIG COMT PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF WEST VIRGINIA.

DOOR-OPERATIN Gr MECHANISM.

Speciication of Letters Patent.'

Patented May 7,1918.

Application led August 26, 1915. Serial No. 47,512.

Be it known that I, Panis R. FORMAN, a citizen of the United States, residing at Chicago, county of Cook, and State of Illi nois, have made a'certain new and useful Invention in Door-Operating Mechanism, of `which the following is a specification.

This invention relates to door operating mechanism of the motor driven class.

The object of the invention is to provide a motor actuated door operating mechanism with a yielding or shiftable connection between the motor and door to permit a partial opening of the door and its operating connections in case the door, in closing, encounters an obstruction in its path.

A further object of the invention is to provide a 'mechanism of the nature referred to which will permit a partial opening movement of the door or a relative movement of the door and its operatingdevices in case the door in closing encounters an obstruction in its path, without disturbing or arresting the operation of the motor, or j its control devices.

A further object of -thev invention is to provide for a partial or relative movement of the door with relation to its operating connections to the motor without arresting the motor while employing a motor of the gear type to operate the door moving connections. l

A. further object of the invention is to provide means for ,securing a relative movement of the door` and its operating connec# tions with a motor or engine of the geared type.

Other objects of the invention will appear more fully hereinafter.

rIhe invention consists substantially in the construction, combination, location and relative arrangement of parts all as will be more fully'hereinafter set forth, as shown in the accompanying drawing, and nally pointed out in the appended claims.

In the drawing,

bigure 1 is a view in side elevation, parts broken off, `showing the application of a yielding connection between a door and its operating motor, and the operation of the Same. K

it is desirable to avoid possible injury to,-

passengers or others due to lbeing caught between the door and the jambof the door- -way during the closing movement of the doors. The danger of injury due to this .cause is particularly present in the case where doors are moved to open and closed positions by motor driven devices. It is a common practice to employ a yielding shoe on the advancing edge of the door, which, when an obstruction is encountered by the door during its" closing movements, tele' scopes upon the door, and to utilize the relative 'movement of the door and its shoe to arrest or reverse the motor or to disconnect the door from its operating connections with the motor. Various arrangements embodying this idea have been employed. The use of a telescoping shoe, however, involves expense in manufacture, installation and up-keep, besides introducing elements of uncertaintyof operation'due to possible derangement of the connections controlled thereby.

Moreover, ithas been found in practice that a motor or engine of the geared type, that is, a motor or engine which actuates a gear through which the door moving arm is actuated, is a more rugged device to employ in connection with door operating mechanism, is more easily maintained, less expensive to manufacture and operate, and more desirable for such use.

It is among the special purposes of my present invention to provide means to secure a relative or yielding movement of the door and its operating connections to the motor,

and, in a somewhat more limited statement,

to a motor of the geared type,thereby dispensing with the use of the yielding shoe and itsattendant complications and disadvantages.

In carrying out my invention I propose to employ a motor actuated operating arm for moving the door to open and closed positions and to provide means to secure a, limitedv tion ofthe principles of my invention,

`though .in the broad scope of my invention IA do not wish to be limited or restricted to the particular form or type of motor, I have shown a pneumatic motor employing a cylinder 3 employing pistons connected to gether by a rack 4, which meshes with and rotates a gear 5, mounted on a shaft 6. Upon this shaft is mounted a disk 7, having an arm portion 8 extendin therefrom. Carried by the member 7 adlacent to its edge at one side of its center is a bearing lug 9. A rod 10 is mounted'to yslide freely at one end through the lug 9, the other end' of said rod being suitably connected to the door 11 preferab y through a loose sliding connection 1n the usual manner, as indicated at 12. The rod 10 carries a collar 13 between which and the bearin lug 9 is interposed a spring 14 which, if esired, may be conveniently coiled upon the rod l0, and the tension of which is normally exerted to urge said rod longitudinally toward the door. A link 15 is pivotally connected at one end to the free end of the arm 8, and at the other end to the rod 10, and through which the rod is swung when the motor is actuated. l

The 4operation is exceeding] simple. When the motor is operated the s aft 6 and with it the member 7 is rotated. Through the arm 8 and link 15,'the door connection or rod 10 is swung, as' indicated in the dotted line position shown in Fig. 1, to open or close vthe door. If, however the door in closing, encounters an obstructlon in its path the door closing movement will be arrested although' the motor continues its door closing operation. Instead of this action causmg an increasing pressure on the obstruction thereby causing an injury to an arm, leg, foot or other portion of the bod of a passenger, for instance, the rod 10 will7 yield endwise against the tension of spring 14, said rod sliding throu h the bearin lu 9 thereby relievinglthe o struction of t e ger of injuryl t rough increasing pressure and permitting the same to be extracted or vas withdrawn, without injury from between the door and its 'amb, or, if desired, in case the door is closed, or at any point in its closing movement, by exerting pressure on the door tending to move it toward open position the rod 10 will be shifted endwise against the tension of spring 14 thereby permitting relative movement of the door and its connections with the motor actuated drive devices.` Since the spring 14 serves only to maintain normally the rod 10 pressedv endwise t0- ward the door it may be made comparatively of the pushing action is to keep the rod 10 pressed endwise toward the door while accomplishing its door opening function. In the closing movement, however, the link 15 exerts a pull on the rod 10, the tendency of which is to keep the rod -pressed lendwise against the tension of spring 14, thereby, to some extent, overcoming the tension of said spring and hence rendering the relative movement of the door above referred to more easy of laccomplishment in case the door 'in closing encounters an obstruction. Such relative movement of the door, or rather, the endwise movement of the rod 10 is indicated in the heavy dotted line position of the parts of Fig. 1, the pivoted link permitting such movement of the rod by .rocking about its pivoted point of connection to the free end of arm 8. In order to limit the extent of yielding endwise movement of rod 10, a stop 16 is provided on arm 8 which forms an abutment against which the link 15 strikes thereby preventing further endwise movement of said rod 10.

It will be observed that the bearing lug 9 is so positioned relative tothe shaft 6 that their geometric axes are approximately in the same horizontal plane. By so designing the parts that the longitudinal axis of rod 10, when thedoor is closed, is downwardly inclined from the bearing lug 9 below the said horizontal plane of the axes of said lug and shaft 6, an eiicient lock is formed to hold the door in its closed position. In starting the door toward itscompletely closed and locked position as shown 'in full lines in Fig. 1, the initial tendency of the movement of arm 8 and link 15 on rod l0 is to slightly shift the rod 10 endwise against the spring 14, 'thereby relieving the pressure under'which the parts, acting as a lock, hold the door closed. After the horivlation ofthe link and arm 8, the tendency lio -mechanism employing mechanism which permits the.door to be easily shifted or moved relative to the con- -nections with its driving motor or, as the equivalent thereof, the door may be arrested without arresting or reversing the motor or detaching the door driving connections. It will also be seen that the desired relative movement of the door is secured at what# 4ever point in its closing movement it may encounter an obstruction, and that the door may be partially opened by hand when closed without disturbing the motor or the door operating connections thereto, and that these various advantages are secured in a a motor of the geared type. s Y

Man-y variations and changes in details may readily occur to persons skilled in the artvwithout departing from the spirit and scope of my invention as defined in the claims. Y

Having now set forth the object and nature of my invention and a construction embodying the principles thereof, what I claim as new and useful and of my own invention and desire to secure by Letters Patent is,- y

1. In a door ,operating mechanism, a motor, a rock arm operated thereby, a door moving rod, a connection between said arm and rod to swing the latter, and a separate connection between said motor and said rod.

2. In a door operating mechanism, a motor, a rock arm operated thereby, a. door moving rod, a connection between said arm and rod tol swing the latter, and a separate slidable connection between said motor and said rod.

3. In a door operating mechanism, a motor, a rock arm operated'thereby, a door' moving rod, a connection between said arm and rod to swing the latter, and a separate connection between said motor and said rod, said rod being yieldable to pressure exerted against the edge of the door.

4. In a door operating mechanism, a motor, a rock arm operated thereby, a door moving rod, a connection between said larm and rod to swing the latter, and a separate slidable connection between said motorand said rod, said rod being yieldable to pressure exerted against the edge of the door relative to said motor through said slidable connection.

5. In a door operating mechanism, a m0- tor, a rock member actuated thereby, a rod connected to the door slidably connected to said rock member, a yieldingtension interposed between the rod and the rock memberand a link pivotally connected to the rod and rock member to swing the latter independently of the slidable connection betwee said rod and rock member.

.6. In a door operating mechanism, amotor, a rock shaft actuated thereby, a member mounted on said shaft and having a bearing lug at one side of the. rock axis thereof, a

rod extending loosely through said lug and rod and operatingto yieldingly urge the rod endwise toward thedoor, and pivotal connections between the rod and rock member to swing the former..

8. In a ldoor operating mechanism, an actuating member having a bearin lug, a rod mounted to slide freely throug said lug,

said rod being pivotally connected to the door, a collar carried` bysaid rod, a spring interposed between said collar-and said lug, a separate connection between said actuating member and said rod, and means to move said actuating member.

9. In a door operating mechanism, anfac tuating member including al bearing lug, a rod having a collar thereon and extending at one end freely through said lug and pivotally connected at its other end to thedoor, a spring surrounding said rod and interposed between said collar and said lug, a separate connection between said actuated member and said rod, and means to operate said actuating member. n

10. In a door operating mechanism, a motor, a rock shaft actuated thereby, a member mounted on said shaft and having a bearing lug at one side of the rock axis thereof, the axes of said lug and shaft being in substantially a horizontal plane when the door is closed, a longitudinally shiftable spring pressed rod passing through said lug and connected to the door, and operating connections between said rod and rock member,

the longitudinal axis of said rod being downwardly inclined to the plane of said axes when the door is closed.

11. In a door operating mechanism, a motor, a rock shaft actuated thereby, a member carried by said shaft and having a bearing lug, a longitudinally shiftable rod passing through said lug and engaging the door, means carried by said rod for normally urging said rod toward said door, and driving connections between the rod and said member.

12. In a door operating mechanism, a mo- Y rod sassing through said lug and engaging and rod, and. a stop to limit the rockin the oor, and driving connections between movement of the link relative to the roc 1c the rod and said member. member.

13. In a door operating mechanism, a mo- In testimon whereof I have hereunto set 5 tor, a. rock member actuated thereby, a my hand on 's 12th day of August A.. D.,

pressed rod connectedfto the door an en 1915. wise movable relative to the rockmember,

n link p ivnfnuy connecting the rock member PARIS R. FORMAN. 

